Deep dive into who actually profited from the 1929 crash while everyone else got obliterated:

Jesse Livermore aka "Boy Plunger" - classic quant-before-quants-existed play. Spotted weakening rally patterns + steeper declines in late summer '29. Distributed short positions across multiple brokers to mask his massive bearish bet (smart operational security). Netted ~$100M in days (~$1.5B in today's money). His wife thought they were bankrupt when Black Tuesday hit - he showed up with champagne instead.

Joseph Kennedy - went full risk-off based on a legendary signal: got a stock tip from his shoeshine boy. His thesis: if retail with zero financial literacy is in, there's no new capital left to pump prices. Liquidated entire portfolio pre-crash. That preserved capital later bankrolled the Kennedy political machine.

Albert Wiggin - this one's wild. Chase National Bank CEO. Set up a Canadian shell corp to short his own bank's stock while publicly pretending to stabilize markets with coordinated buying. Pocketed $4M tax-free as Chase's share price cratered. Peak insider trading before insider trading laws existed.

The pattern: Livermore read technicals, Kennedy read crowd psychology, Wiggin just straight-up gamed his position. All three understood that when everyone's bullish, the asymmetry flips hard.